determinateness vs determinate

determinateness is a noun but determinate is not a noun.

Word	Noun	Adjective	Verb	Adverb
determinateness	Yes	No	No	No
determinate	No	Yes	No	No

determinateness (noun)	determinate (noun)
the quality of being predictable with great confidence

determinateness (adjective)	determinate (adjective)
	precisely determined or limited or defined; especially fixed by rule or by a specific and constant cause
	not continuing to grow indefinitely at the apex
	supplying or being a final or conclusive settlement